Description of the flag

Tervuren (19,500 inhabitants) is located in the arrondissement of
Leuven.
Tervuren may be considered as virtual capital of Congo; its
Koloniënpaleis (Palace of the Colonies) was originally
built by Prince William of Orange, the later King Willem II of the
Netherlands; that building burned down in 1879; it was rebuilt for
the World Exposition of 1897, and expanded to harbor the treasures
the Belgian kings had gathered in the
Congo Free State, later Belgian
Congo.

"The arms were granted on May 29, 1838. The arms show a crowned
lion, which already appeared on the oldest known seals of the city,
dating from 1312. The lion most likely originally was the lion of
Brabant, even though this lion was not normally crowned. In 1435 the
city became a possession of Jan Hinckaert, illegitimate son of the
Duke of Brabant. His arms were shown on a paining from 1480, and
showed a quartered shield with in the first and fourth quarter a
silver crowned lion on a black field with silver billets, and in the
second and third quarter the Hinckaert arms, a blue crowned lion. Why
the council in the 1830s applied only for the Hinckaert arms is not
known."